Curious Kids: How does cosmic microwave background radiation work?

The Cosmic Microwave Background (CMB for short), is light: the oldest and most distant light that we can see in the entire universe. (Image credit: Yaroslav Vitkovskiy/Shutterstock)

This article was originally published at The Conversation. (opens in new tab) The publication contributed the article to Space.com’s Expert Voices: Op-Ed & Insights (opens in new tab).

What is cosmic microwave background radiation? Did it happen after the Big Bang? – Sreehari, aged nine, Kerala State, India



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